CN210096747U - Cantilever crane subassembly and fire engine - Google Patents

Abstract

The utility model provides a cantilever crane subassembly and fire engine, cantilever crane subassembly includes: rotating; cantilever crane mechanism, cantilever crane mechanism includes: one end of the folding arm is hinged with the rotary seat, and the folding arm comprises at least two sections of sub-folding arms which are hinged with each other; the fixed end of the telescopic arm is hinged with the other end of the folding arm; the tail end arm is hinged with the telescopic end of the telescopic arm; the driving mechanism is connected with the arm support mechanism; the driving mechanism is used for driving the folding arm to rotate relative to the rotary seat, driving the telescopic arm to rotate relative to the folding arm and driving the tail end arm to rotate relative to the telescopic arm. By arranging the arm support mechanism, the arm support mechanism can span the obstacle in front of the arm support mechanism by adjusting the folding arm, so that the telescopic arm can be adjusted to the position above the obstacle and then telescopic operation is performed, the working coverage range of the arm support mechanism is greatly enlarged, the space occupied by the telescopic arm in a recovery state is smaller, and the space occupied by the arm support mechanism can be reduced.

Description

Cantilever crane subassembly and fire engine

Technical Field

The utility model relates to a fire-fighting equipment technical field particularly, relates to an arm frame subassembly and fire engine.

Background

The existing elevating jet fire truck basically comprises two arm supports, one is a traditional telescopic and telescopic structure, and the amplitude of the arm support is changed by adopting an oil cylinder link mechanism between two groups of telescopic arms. But the working amplitude is small, the arm support is only provided with one folding joint, the action is not flexible, and the high-precision operation in a complex environment is difficult to realize. In addition, the fully-folded arm support elevating jet fire truck developed in recent years has the technical problems that the multi-section folded arm support performs amplitude variation motion through a link mechanism, the arm support is complex in structure, operation difficulty is high during operation of the fire truck, and the arm support is long in unfolding time.

Therefore, how to design an arm support assembly with large working range, simple structure and short deployment time becomes a technical problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.

To this end, an aspect of the present invention is to provide an arm rest assembly.

Another aspect of the present invention is to provide a fire engine.

In view of this, according to the first object of the present invention, there is provided an arm support assembly for a fire fighting truck, the arm support assembly comprising: rotating; cantilever crane mechanism, cantilever crane mechanism includes: one end of the folding arm is hinged with the rotary seat, and the folding arm comprises at least two sections of sub-folding arms which are hinged with each other; the fixed end of the telescopic arm is hinged with the other end of the folding arm; the tail end arm is hinged with the telescopic end of the telescopic arm; the driving mechanism is connected with the arm support mechanism; the driving mechanism is used for driving the folding arm to rotate relative to the rotary seat, driving the telescopic arm to rotate relative to the folding arm and driving the tail end arm to rotate relative to the telescopic arm.

According to the utility model provides a jib subassembly, the swivel mount is jib subassembly's base structure, and jib subassembly is connected in engineering equipment such as fire engine through the swivel mount to it is together rotated along with the swivel mount to drive jib subassembly. The arm support mechanism is a main working part of the arm support assembly and comprises three parts: the first part is a folding arm, the first end of the folding arm is hinged with the rotary seat, and the folding arm rotates relative to the rotary seat in the working process; the second part is a telescopic arm, the telescopic arm is an arm support with adjustable length, the fixed end of the telescopic arm is hinged with the second end of the folding arm, and the telescopic arm rotates relative to the second end of the folding arm in the working process and extends or shortens on the basis; the third part is tail end arm, and tail end arm is articulated mutually with the flexible end of flexible arm to can rotate the flexible end of flexible arm relatively on this basis, tail end arm's self also can rotate or stretch out and draw back. The driving mechanism is a power structure of the arm support assembly and is used for providing power to the arm support mechanism so as to realize rotation of the arm support mechanism. The boom support mechanism is arranged into the structure, so that the boom support assembly firstly turns the boom support mechanism through the folding arm in the working process to reach the required height, then the tail end arm extends out through the telescopic arm to reach the required transverse span, and finally the working position and the working angle are adjusted through the tail end arm. The arm support mechanism can cross over an obstacle in front of the arm support mechanism by adjusting the angle of the arm support through the arrangement of the folding arm, so that the telescopic arm can be adjusted to be above the obstacle and then telescopic operation is performed. Through setting up flexible arm, increased the work coverage of cantilever crane mechanism by a wide margin to, flexible arm shared space under the recovery state is less, can reduce the shared space of cantilever crane mechanism, and in addition, flexible arm stretching speed is fast, and the fire engine of being convenient for implements the rescue fast. Through setting up the tail end arm for the terminal equipment that is connected of boom mechanism can adjust working angle through the rotation of tail end arm, thereby makes the boom mechanism can carry equipment execution angle and the more accurate work in position, and then realizes optimizing the boom structure, promotes the boom frame subassembly and strides across obstacle ability, widens the extension coverage of boom frame subassembly, promotes the accurate nature and the reliability of product work, promotes the technological effect that the user used and experienced.

Specifically, the existing elevating jet fire truck basically comprises two arm supports, one is a traditional telescopic and telescopic structure, and the amplitude of the boom is changed by adopting an oil cylinder link mechanism between two groups of telescopic booms. But the working amplitude is small, the arm support is only provided with one folding joint, the action is not flexible, and the high-precision operation in a complex environment is difficult to realize. In addition, the fully-folded arm support elevating jet fire truck developed in recent years has the technical problems that the multi-section folded arm support performs amplitude variation motion through a link mechanism, the arm support is complex in structure, operation difficulty is high during operation of the fire truck, and the arm support is long in unfolding time. To the technical problem, the utility model discloses a set up mutual articulated folding arm, flexible arm and tail end arm, make folding arm can the relative swivel mount rotate, folding arm self is rotatable, make flexible arm can the relative folding arm rotate, make tail end arm can the relative flexible arm rotate, the flexibility ratio of cantilever crane mechanism obtains guaranteeing, make cantilever crane mechanism can freely stride across the barrier and the terminal work angle of accurate adjustment cantilever crane to above-mentioned action is inflexible, can't realize the technical problem of complex environment high accuracy operation. Through setting up flexible arm, make the flexible regulation of tail end arm accessible flexible arm correspond whole operating position to the simple structure of flexible arm, flexible consuming time is short, and occupation space is little under the state of withdrawing, thereby has solved above-mentioned structure complicacy, and the operation degree of difficulty is big, the long technical problem of cantilever crane development time.

Further, among the current jib subassembly, still include a section folding + multisection is flexible + multisection telescopic jib form, in order to obtain longer, higher jib, the revolving stage sets up highly, when this jib is in fold condition, each cantilever crane slope sets up, if be used for the fire engine, leads to the fire engine superelevation easily, is not conform to the requirement of road safety regulation, simultaneously, because this cantilever crane structure only has three pin joint, therefore, the flexibility of cantilever crane is not enough, and the utility model discloses limited jib subassembly compares in this cantilever crane structure, when the cantilever crane expandes, and the ability of strideing across the obstacle is stronger, and horizontal span is bigger, and when the cantilever crane was packed up, it is compacter, can not lead to the vehicle superelevation, therefore possesses more outstanding flexibility ratio and degree of freedom to and possess higher space utilization.

Additionally, the utility model provides an arm frame subassembly among the above-mentioned technical scheme can also have following additional technical characteristics:

in the above technical solution, preferably, the folding arm includes: one end of the first sub-folding arm is hinged with the rotary seat; the folding arm of second son, the one end of the folding arm of second son is articulated mutually with the other end of the folding arm of first son, and the other end of the folding arm of second son is articulated mutually with the fixed end of flexible arm.

In the technical scheme, the folding arm is composed of a first sub-folding arm and a second sub-folding arm. The first end of the first sub-folding arm is hinged to the rotary seat, the second end of the first sub-folding arm is hinged to the first end of the second sub-folding arm, and the second end of the second sub-folding arm is hinged to the fixed end of the telescopic arm. The folding arm is set to be of a two-section folding structure, after the arm support mechanism is turned over through the rotation of the first sub folding arm, the working angle of the arm support mechanism is further adjusted through the second sub folding arm, so that the flexibility of the arm support mechanism is enhanced, the arm support mechanism can cross over the front obstacle through the first sub folding arm and the second sub folding arm, the arm support assembly structure is optimized, the arm support assembly flexibility is improved, and the technical effects of the product working accuracy and the product reliability are improved.

In any of the above solutions, preferably, in the retracted state, the first sub-folding arm, the second sub-folding arm, the telescopic arm and the trailing arm are at least partially parallel to each other.

In this technical scheme, when the cantilever crane subassembly is in the state of withdrawing, first sub-folding arm is rotatory to horizontal position, it is relative, the sub-folding arm of second, flexible arm and tail end arm are adjusted to horizontal position through the upset equally, make cantilever crane mechanism reduce horizontal and vertical space demand of cantilever crane subassembly under the state of withdrawing through horizontal superpose as far as possible on the basis of folding reduction length, thereby make the structure of cantilever crane subassembly more exquisite compactness, and then realize optimizing cantilever crane subassembly structure, reduce cantilever crane subassembly space demand, promote the technological effect of product practicality.

In any of the above technical solutions, preferably, in the retracted state, the second sub-folding arm is located directly below the first sub-folding arm; the telescopic arm is positioned on the side of the first sub-folding arm, and the telescopic arm and the first sub-folding arm are positioned on the same horizontal plane; the tail end arm is positioned under the telescopic arm.

In the technical scheme, when the boom assembly is in a retracted state, the positional relationship among the boom structures is as follows: the second sub-folding arm is positioned right below the first sub-folding arm; the telescopic arm is positioned on the side of the first sub-folding arm and on the same horizontal plane; the tail end arm is positioned under the telescopic arm. Through injecing above-mentioned position relation, make the structure of the jib subassembly under the state of withdrawing compacter reasonable to reduce the space demand of jib subassembly in direction of height and width direction, thereby avoid the jib subassembly under the state of withdrawing to appear superelevation or super wide problem, and then realize optimizing jib subassembly structure, promote jib subassembly compactness, reduce jib subassembly space demand, promote the technological effect of product practicality.

In any of the above technical solutions, preferably, the arm support assembly further includes: the side mechanism comprises two connecting ends which are hinged relatively, one connecting end is connected with the folding arm, and the other connecting end is connected with the telescopic arm.

In the technical scheme, a method for laterally arranging a telescopic arm is provided: the cantilever crane comprises a cantilever crane component, and is characterized in that a side mechanism is further arranged in the cantilever crane component, wherein the side mechanism comprises two connecting ends which are hinged oppositely, the two connecting ends are arranged in a staggered mode in the transverse direction or the longitudinal direction, one connecting end is connected with a folding arm, and the other connecting end is connected with a telescopic arm. Specifically, the side mechanism comprises a first arm head and a second arm head which are connected in a rotating mode and arranged laterally, wherein the first arm head is connected with the second sub-folding arm, and the second arm head is connected with the telescopic arm. In the working process, the first arm head and the second arm head can rotate relatively, so that the second sub-folding arm and the telescopic arm can be laterally arranged on the same plane, the lateral space of the arm support mechanism is effectively utilized, the space requirement of the length direction of the arm support mechanism in a retracting state is reduced, the arm support assembly structure is optimized, the structural compactness of the arm support assembly is improved, the space requirement of the arm support assembly is reduced, and the technical effect of the product practicability is improved.

In any of the above technical solutions, preferably, the second sub-folding arm is an arm support structure that is bent laterally, and the telescopic arm is hinged to a side connection end of the second sub-folding arm.

In the technical scheme, another telescopic arm side-placing method is provided: the second sub-folding arm is arranged to be the laterally bent arm support structure, the laterally-bent arm support structure replaces a laterally-arranged mechanism in a first telescopic arm laterally-arranged method, in the assembling process, the second sub-folding arm and the telescopic arm can be laterally arranged on the same plane through hinging the side-arranged connecting end of the telescopic arm and the second sub-folding arm, the lateral space of the arm support mechanism is effectively utilized, the space requirement of the arm support mechanism in the length direction in the withdrawing state is reduced, the optimized arm support assembly structure is realized, the structural compactness of the arm support assembly is improved, the space requirement of the arm support assembly is reduced, and the technical effect of the product practicability is improved.

In any of the above technical solutions, preferably, the driving mechanism includes: one end of the first oil cylinder is hinged with the rotary seat, and the other end of the first oil cylinder is hinged with the first sub-folding arm.

In this technical scheme, be provided with first hydro-cylinder in the jib subassembly, preferably, the one end of first hydro-cylinder is the hydro-cylinder base, and the other end is the flexible end of hydro-cylinder. The base of the first oil cylinder is hinged with the rotary seat, the telescopic end of the first oil cylinder is hinged with the first sub-folding arm, and the first oil cylinder is connected with the oil pump through an oil way. In the working process, the oil pump presses hydraulic oil into the first oil cylinder, so that the telescopic end of the first oil cylinder extends out under the action of oil pressure, and the first sub-folding arm is driven to unfold relative to the rotary seat. Correspondingly, when the oil pump draws back the hydraulic oil in the first oil cylinder, the telescopic end of the first oil cylinder retracts, so that the first sub-folding arm is driven to retract and rotate on the rotating seat. And the oil cylinder drive has the advantages of strong bearing capacity, stable movement and the like, so that the arm support mechanism is more suitable for heavy-load occasions, and the technical effects of optimizing the arm support assembly structure and improving the movement stability and reliability of the arm support assembly are achieved.

In any one of the above technical solutions, preferably, the driving mechanism further includes: a first set of bars, the first set of bars comprising: one end of the first rod piece is hinged with the other end of the first sub-folding arm; one end of the second rod piece is hinged with one end of the second sub-folding arm, and the other end of the second rod piece is hinged with the other end of the first rod piece; one end of the second oil cylinder is hinged with the first sub-folding arm, and the other end of the second oil cylinder is hinged with the first rod piece; a second set of bars, the second set of bars comprising: one end of the third rod piece is hinged with the fixed end of the telescopic arm; one end of the fourth rod is hinged with the other end of the second sub-folding arm, and the other end of the fourth rod is hinged with the other end of the third rod; one end of the third oil cylinder is hinged with the fixed end of the telescopic arm, and the other end of the third oil cylinder is hinged with the third rod piece; a third bar set, the third bar set comprising: one end of the fifth rod piece is hinged with the telescopic end of the telescopic arm; one end of the sixth rod is hinged with the tail end arm, and the other end of the sixth rod is hinged with the other end of the fifth rod; one end of the fourth oil cylinder is hinged with the tail end arm, and the other end of the fourth oil cylinder is hinged with the fifth rod piece; the hinge point of the first sub-folding arm and the second sub-folding arm is not overlapped with the hinge point of the first rod piece and the first sub-folding arm; the hinge point of the first sub-folding arm and the second sub-folding arm is not overlapped with the hinge point of the second rod piece and the second sub-folding arm; the hinge point of the second sub-folding arm and the telescopic arm is not superposed with the hinge point of the third rod piece and the telescopic arm; the hinged point of the second sub-folding arm and the telescopic arm is not superposed with the hinged point of the fourth rod piece and the second sub-folding arm; the hinged point of the telescopic arm and the tail end arm is not superposed with the hinged point of the fifth rod piece and the telescopic arm; the hinge point of the telescopic arm and the tail end arm is not overlapped with the hinge point of the sixth rod piece and the tail end arm.

In this technical scheme, actuating mechanism still includes first pole group and second hydro-cylinder, and preferably, the one end of second hydro-cylinder is the hydro-cylinder base, and the other end is the flexible end of hydro-cylinder. Wherein, first pole group comprises first member and second member, is provided with three pin joint on the first member, is provided with two pin joints on the second member. In the assembling process, a first hinge point of the first rod piece is hinged with the first sub-folding arm, and the hinge point is not overlapped with the hinge point of the first sub-folding arm and the second sub-folding arm; the first hinge point of the second rod piece is hinged with the second sub-folding arm, and the hinge point is also not superposed with the hinge point of the first sub-folding arm and the second sub-folding arm; the second hinge point of the first rod piece is hinged with the second hinge point of the second rod piece. Thereby, a set of four-bar linkage is formed by the first bar, the second bar, the interval between the hinge point of the first bar and the first sub-folding arm and the hinge point of the first sub-folding arm and the second sub-folding arm, the interval between the hinge point of the second bar and the second sub-folding arm and the interval between the hinge point of the first sub-folding arm and the hinge point of the second sub-folding arm. On the basis, the base of the second oil cylinder is hinged with the first sub-folding arm, and the telescopic end of the second oil cylinder is hinged with the third hinge point of the first rod piece. In the course of the work, the oil pump is with in the hydraulic oil pump sends the second hydro-cylinder, the flexible end of second hydro-cylinder stretches out under the oil pressure, rotate with the second member in order to promote first member, under above-mentioned four-bar linkage's effect, the sub-folding arm of second expandes to required working angle from the position that is parallel to first sub-folding arm mutually, and then realized the expansion and the folding of the sub-folding arm of second relative first sub-folding arm, and realized optimizing boom frame assembly structure, promote boom frame subassembly flexibility ratio, reduce boom frame subassembly occupation space, promote the technological effect of product reliability and practicality.

The driving mechanism further comprises a second rod group and a third oil cylinder, preferably, one end of the third oil cylinder is an oil cylinder base, and the other end of the third oil cylinder is an oil cylinder telescopic end. Wherein, the second pole group comprises third member and fourth member, is provided with three pin joint on the third member, is provided with two pin joint on the fourth member. In the assembling process, a first hinge point of the third rod piece is hinged with the telescopic arm, and the hinge point is not overlapped with the hinge point of the second sub-folding arm and the telescopic arm; a first hinge point of the fourth rod piece is hinged with the second sub-folding arm, and the hinge point is also not superposed with the hinge point of the second sub-folding arm and the telescopic arm; the second hinge point of the third rod piece is hinged with the second hinge point of the fourth rod piece. Thereby through third member, fourth member, third member and the pin joint of flexible arm and the sub-pin joint interval between the folding arm of second and the pin joint of flexible arm, the pin joint of fourth member and the sub-folding arm of second and the sub-pin joint interval between the folding arm of second and the flexible arm, form a set of four-bar linkage. On the basis, the base of the third oil cylinder is hinged with the telescopic arm, and the telescopic end of the third oil cylinder is hinged with the third hinge point of the third rod piece. In the course of the work, the oil pump is with in the hydraulic oil pump sends to the third hydro-cylinder, the flexible end of third hydro-cylinder stretches out under the oil pressure, rotate with the fourth rod piece in order to promote the third rod piece, under above-mentioned four-bar linkage's effect, flexible arm is expanded to required working angle from the position that is parallel to the sub-folding arm of second mutually, and then realized the expansion and folding of the sub-folding arm of the relative second of flexible arm, and realized optimizing boom frame assembly structure, promote boom frame assembly flexibility ratio, reduce boom frame assembly occupation space, promote the technological effect of product reliability and practicality.

The driving mechanism further comprises a third rod group and a fourth oil cylinder, preferably, one end of the fourth oil cylinder is an oil cylinder base, and the other end of the fourth oil cylinder is an oil cylinder telescopic end. The third rod group consists of a fifth rod piece and a sixth rod piece, the fifth rod piece is provided with three hinge points, and the sixth rod piece is provided with two hinge points. In the assembling process, a first hinge point of the fifth rod piece is hinged with the telescopic arm, and the hinge point is not overlapped with the hinge point of the telescopic arm and the tail end arm; a first hinge point of the sixth rod piece is hinged with the tail end arm, and the hinge point is also not superposed with the hinge point of the telescopic arm and the tail end arm; the second hinge point of the fifth rod piece is hinged with the second hinge point of the sixth rod piece. Thereby through the pin joint of fifth member, sixth member, fifth member and flexible arm and the pin joint interval between the pin joint of flexible arm and tail end arm, the pin joint of sixth member and tail end arm and the pin joint interval between the pin joint of flexible arm and tail end arm, form a set of four-bar linkage. On the basis, the base of the fourth oil cylinder is hinged with the tail end arm, and the telescopic end of the fourth oil cylinder is hinged with the third hinge point of the fifth rod piece. In the course of the work, the oil pump is with in the hydraulic oil pump sends to the fourth hydro-cylinder, the flexible end of fourth hydro-cylinder stretches out under the oil pressure, rotate with the sixth member in order to promote fifth member, under above-mentioned four-bar linkage's effect, tail end arm expandes to required working angle from the position that is parallel to each other with flexible arm, and then realized the relative flexible arm's of tail end arm expansion and folding, and realized optimizing boom frame subassembly structure, promote boom frame subassembly flexibility ratio, reduce boom frame subassembly occupation space, promote the technological effect of product reliability and practicality.

In any of the above technical solutions, preferably, the telescopic boom is two sections of telescopic booms or three sections of telescopic booms; the tail end arm is a section of folding arm or two sections of folding arms, or the tail end arm is a section of telescopic arm or three sections of telescopic arms.

In the technical scheme, the telescopic arm is two sections of telescopic arms or three sections of telescopic arms. Taking three-section telescopic boom as an example, the telescopic boom is composed of a first section of telescopic boom, a second section of telescopic boom and a third section of telescopic boom. One section flexible arm is the major structure of flexible arm, and its one section is articulated mutually with the folding arm of second son, wholly contains the tubular structure of cavity for inside. The two sections of telescopic arms are both tubular structures with cavities arranged inside and are arranged in the cavities of the one section of folding arms. The three sections of folding arms are arranged in the cavity of the three sections of folding arms. When the telescopic boom is not extended, the two sections of telescopic booms are positioned in the cavity of the one section of telescopic boom, and the three sections of telescopic booms are positioned in the cavity of the two sections of telescopic booms; when the telescopic boom extends, the two sections of telescopic booms extend out along the cavity extending direction of the one section of folding boom, and the three sections of telescopic booms extend out along the cavity extending direction of the two sections of telescopic booms, so that the tail end boom connected with the three sections of telescopic booms is extended to a required working position. The nested telescopic boom occupies a smaller space in a retracting state, so that the boom assembly is more exquisite and compact, the telescopic length of the nested telescopic boom is shorter, designated work can be completed quickly in a short time, the telescopic time is saved, the structure of the telescopic boom is optimized, the working efficiency of the telescopic boom is improved, the structure compactness of a product is improved, and the technical effect of the working reliability of the product is improved.

The tail end arm is one section of folding arm or two sections of folding arms, and the action is nimble to through setting up the tail end arm into two sections of folding arms, promoted the flexibility ratio of tail end arm, make the tail end arm can be more nimble convenient stride across the barrier and carry out fire control work, can also make the work coverage of tail end arm further enlarge simultaneously, and then realize optimizing tail end arm structure, promote cantilever crane subassembly work flexibility ratio and coverage, promote product operational reliability's technological effect. The tail end arm can obtain a longer length by setting the tail end arm into two sections of telescopic arms or three sections of telescopic arms.

The utility model discloses a second purpose provides a fire engine, and the fire engine contains the cantilever crane subassembly of any one of above-mentioned arbitrary technical scheme, and this fire engine has the whole beneficial effects of the pump body that any one of above-mentioned technical scheme provided. Simultaneously, this fire engine still includes: the device comprises a vehicle body, a workbench and a cab are arranged on the vehicle body, a swivel base is rotatably connected with the workbench and is close to the cab, and an arm support assembly is retracted on the workbench; the water cannon is arranged on the tail end arm; the water supply system is arranged on the vehicle body; the pipeline system is arranged on the vehicle body, one end of the pipeline system is connected with the water supply system, and the other end of the pipeline system is connected with the water cannon; wherein, in the state of withdrawing of jib subassembly, the folding arm and the flexible arm of jib subassembly and the length direction parallel arrangement of automobile body.

In this technical scheme, the automobile body is the major structure of fire engine, is provided with workstation and driver's cabin on it, and the driver's cabin is located one side of workstation, and through rotating swivel mount and workstation and linking to each other, the plane that makes the swivel mount can be relative the workstation rotates, makes the cantilever crane subassembly can adjust cantilever crane subassembly to the exact operating position through the swivel mount rotation under the condition of the inconvenient adjustment orientation of fire engine. When the jib assembly is retracted, the jib assembly is positioned above the workbench, and the vehicle body is responsible for bearing the jib assembly. Further, the arm support assembly can extend towards the tail of the vehicle body by arranging the rotary seat close to the cab, so that the arm support assembly is prevented from being interfered by the cab in the unfolding process; on the other hand, compare in the setting mode that the driver's cabin was kept away from to the swivel mount, set up the swivel mount and can increase the length of jib subassembly to a certain extent in the position that is close to the driver's cabin, reduce automobile body length to make the fire engine structure compacter, the practicality is stronger.

Through set up the water cannon at the tail end arm, make the fire engine can transport the water cannon to source of a fire department and put out the source of a fire through the high-pressure water column that the water cannon jetted out through the extension jib subassembly to realize the fire control operation. Wherein, still be provided with water supply system and the pipe-line system that keeps water cannon work on the automobile body, water supply system, pipe-line system and water cannon link to each other in proper order, and water supply system is during with fire-fighting water pump sending pipeline system in the working process to finally spout from water cannon department, in order to accomplish the fire control operation through the water cannon. In addition, because in the state of withdrawing of jib subassembly, the folding arm of jib subassembly and the length direction parallel arrangement of flexible arm and automobile body, compact structure can satisfy the high demand of fire engine.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows a schematic of a prior art boom assembly construction;

FIG. 2 shows a schematic view of the boom assembly of FIG. 1 in a retracted state;

fig. 3 illustrates a schematic structural view of a boom assembly provided in accordance with an embodiment of the present invention;

fig. 4 illustrates a schematic structural view of a boom assembly provided in accordance with another embodiment of the present invention;

FIG. 5 shows a top view of the boom assembly provided in the embodiment shown in FIG. 4;

fig. 6 shows a schematic structural view of a first rod set according to an embodiment of the present invention;

fig. 7 shows a schematic structural view of a second set of bars provided according to an embodiment of the invention;

fig. 8 shows a schematic structural view of a third bar set provided according to an embodiment of the present invention;

FIG. 9 shows a schematic structural view of a biasing mechanism provided in the embodiment shown in FIG. 3;

FIG. 10 shows a top view of the biasing mechanism provided by the embodiment shown in FIG. 9;

fig. 11 illustrates a schematic structural view of a boom assembly provided in accordance with yet another embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 3 to 11 is:

1 fire engine, 12 swivel bases, 14 boom mechanisms, 142 folding arms, 144 first sub folding arms, 146 second sub folding arms, 148 telescopic arms, 150 first telescopic arms, 152 second telescopic arms, 154 third telescopic arms, 156 tail end arms, 158 side mechanisms, 162 first oil cylinders, 164 first rod sets, 166 first rods, 168 second rods, 170 second oil cylinders, 172 second rod sets, 174 third rods, 176 fourth rods, 178 third oil cylinders, 180 third rod sets, 182 fifth rods, 184 sixth rods, 186 fourth oil cylinders, 20 vehicle bodies and 30 water cannons.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A boom assembly and a fire fighting vehicle 1 according to some embodiments of the present invention will be described below with reference to fig. 3 to 11.

In view of this, according to the embodiment of the present invention, as shown in fig. 3, there is provided an arm support assembly for a fire fighting truck 1, the arm support assembly including: a rotary base 12; cantilever crane mechanism 14, cantilever crane mechanism 14 includes: folding arm 142, one end of folding arm 142 is hinged with swivel base 12, folding arm 142 includes at least two sections of sub-folding arms hinged with each other; a fixed end of the telescopic arm 148 is hinged with the other end of the folding arm 142; a tail end arm 156 hinged to the telescopic end of the telescopic arm 148; a driving mechanism (not shown in the figure) connected with the arm support mechanism 14; wherein, the driving mechanism is used for driving the folding arm 142 to rotate relative to the rotary seat 12, for driving the telescopic arm 148 to rotate relative to the folding arm 142, and for driving the tail end arm 156 to rotate relative to the telescopic arm 148.

According to the utility model provides a jib subassembly, swivel mount 12 is jib subassembly's base structure, and jib subassembly is connected in engineering equipment such as fire engine 1 through swivel mount 12 to it is together rotated along with swivel mount 12 to drive jib subassembly. The boom mechanism 14 is a main working part of the boom assembly, and the boom mechanism 14 is composed of three parts: the first part is a folding arm 142, the first end (head end) of the folding arm 142 is hinged with the rotary seat 12, and the folding arm 142 rotates relative to the rotary seat 12 in the working process; the second part is a telescopic arm 148, the telescopic arm 148 is an arm support with adjustable length, the fixed end of the telescopic arm 148 is hinged with the second end (the integral tail end) of the folding arm 142, and the telescopic arm 148 rotates relative to the second end of the folding arm 142 in the working process and extends or shortens on the basis; the third part is a tail end arm 156, the tail end arm 156 is hinged with the telescopic end of the telescopic arm 148, the third telescopic arm extends out or retracts under the adjustment of the telescopic arm 148 in the working process, and can rotate relative to the telescopic end of the telescopic arm 148 on the basis, and the tail end arm can also rotate or stretch. The driving mechanism is a power structure of the boom assembly and is used for providing power to the boom mechanism 14 so as to realize rotation of the boom mechanism 14. By arranging the boom mechanism 14 in the aforementioned structure, the boom assembly firstly turns the boom mechanism 14 over by the folding arm 142 to reach the required height during the operation, then extends the tail end arm 156 by the telescopic arm 148 to reach the required transverse span, and finally adjusts the operation position and the operation angle by the tail end arm 156. By arranging the folding arm 142, the boom mechanism 14 can cross over an obstacle in front of the boom mechanism 14 by adjusting an angle, so that the telescopic arm 148 can be adjusted to be above the obstacle and then telescopic operation can be performed. By arranging the telescopic arm 148, the working coverage range of the arm support mechanism 14 is greatly increased, the space occupied by the telescopic arm 148 in the recovery state is smaller, the space occupied by the arm support mechanism 14 can be reduced, in addition, the telescopic arm has high extension speed, and the fire truck can conveniently and quickly rescue. Through setting up tail end arm 156 for the terminal equipment that is connected of boom mechanism 14 can adjust operating angle through tail end arm 156's rotation, thereby makes boom mechanism 14 can carry the more accurate work of equipment execution angle and position, and then realizes optimizing the boom structure, promotes the boom frame subassembly and strides across obstacle ability, widens the extension coverage of boom frame subassembly, promotes product work accuracy and reliability, promotes the technological effect that the user used and experienced.

Specifically, the existing elevating jet fire truck basically comprises two arm supports, one is a traditional telescopic and telescopic structure, and the amplitude of the boom is changed by adopting an oil cylinder link mechanism between two groups of telescopic booms. But the working amplitude is small, the arm support is only provided with one folding joint, the action is not flexible, and the high-precision operation in a complex environment is difficult to realize. In addition, the fully-folded arm support elevating jet fire truck developed in recent years has the technical problems that the multi-section folded arm support performs amplitude variation motion through a link mechanism, the arm support is complex in structure, operation difficulty is high during operation of the fire truck, and the arm support is long in unfolding time. To the technical problem, the utility model discloses a set up mutual articulated folding arm 142, flexible arm 148 and tail end arm 156, make folding arm 142 rotate swivel mount 12 relatively, folding arm 142 self is rotatable, make flexible arm 148 rotate folding arm 142 relatively, make tail end arm 156 rotate flexible arm 148 relatively, the flexibility ratio of cantilever crane mechanism 14 has been promoted by a wide margin, make cantilever crane mechanism 14 can freely stride across the barrier and the terminal operating angle of accurate adjustment cantilever crane, thereby above-mentioned action is inflexible, can't realize the technical problem of complex environment high accuracy operation. By arranging the telescopic arm 148, the tail end arm 156 can be adjusted to a working position through the telescopic adjustment of the telescopic arm 148, and the telescopic arm 148 has the advantages of simple structure, short telescopic time consumption and small occupied space in a retracting state, thereby solving the technical problems of complex structure, high operation difficulty and long cantilever crane unfolding time.

Further, among the existing boom mechanism, as shown in fig. 1, still include a section of folding + multisection is flexible boom form, in order to obtain longer, higher boom, the revolving stage sets up highly, when this boom is in fold condition, as shown in fig. 2, each boom slope sets up, if be used for the fire engine, lead to the fire engine superelevation easily, be not conform to the requirement of road safety regulation, simultaneously, because this boom structure only has three pin joint, therefore, the flexibility of boom is not enough, and the utility model discloses limited boom mechanism 14 compares in this boom structure, when the boom expandes, the ability of striding over the obstacle is stronger, and the horizontal span is bigger, when the boom is packed up, and is compacter, can not lead to the vehicle superelevation, therefore possesses more outstanding flexibility ratio and degree of freedom, and possesses higher space utilization.

In an embodiment of the present invention, preferably, as shown in fig. 3, the folding arm 142 includes: a first sub-folding arm 144, one end of the first sub-folding arm 144 is hinged with the rotary seat 12; and a second sub-folding arm 146, one end of the second sub-folding arm 146 being hinged to the other end of the first sub-folding arm 144, and the other end of the second sub-folding arm 146 being hinged to the fixed end of the telescopic arm 148.

In this embodiment, the folding arm 142 is made up of two parts, a first sub-folding arm 144 and a second sub-folding arm 146. Wherein, the first end of the first sub-folding arm 144 is hinged with the rotary seat 12, the second end is hinged with the first end of the second sub-folding arm 146, and the second end of the second sub-folding arm 146 is hinged with the fixed end of the telescopic arm 148. By setting the folding arm 142 into a two-section folding structure, after the arm support mechanism 14 is turned over by the first sub-folding arm 144, the working angle of the arm support mechanism 14 is further adjusted by the second sub-folding arm 146, so that the flexibility of the arm support mechanism 14 is enhanced, the arm support mechanism 14 can cross over the front obstacle through the first sub-folding arm 144 and the second sub-folding arm 146, the arm support assembly structure is optimized, the flexibility of the arm support assembly is improved, and the technical effects of the working accuracy and the reliability of products are improved.

In one embodiment of the present invention, preferably, as shown in fig. 4 and 5, in the retracted state, the first sub-folding arm 144, the second sub-folding arm 146, the telescopic arm 148 and the trailing arm 156 are at least partially parallel to each other.

In this embodiment, when the boom assembly is in the retracted state, the first sub-folding arm 144 rotates to the horizontal position, and relatively, the second sub-folding arm 146, the telescopic arm 148 and the tail end arm 156 are also adjusted to the horizontal position by turning over, so that the boom mechanism 14 reduces the space requirement of the boom assembly in the retracted state in the horizontal and longitudinal directions as much as possible by horizontal stacking on the basis of the folding reduced length, thereby making the structure of the boom assembly more compact, further optimizing the structure of the boom assembly, reducing the space requirement of the boom assembly, and improving the technical effect of the product practicability.

In one embodiment of the present invention, preferably, as shown in fig. 4 and 5, in the retracted state, the second sub-folding arm 146 is located directly below the first sub-folding arm 144; the telescopic arm 148 is located at the side of the first sub-folding arm 144, and the telescopic arm 148 and the first sub-folding arm 144 are located on the same horizontal plane; trailing arm 156 is located directly below telescoping arm 148.

In this embodiment, when the boom assembly is in the retracted state, the positional relationship between the respective boom structures is as follows: the second sub-folding arm 146 is located directly below the first sub-folding arm 144; the telescopic arm 148 is located at the side of the first sub-folding arm 144 and on the same horizontal plane; trailing arm 156 is located directly below telescoping arm 148. Through injecing above-mentioned position relation, make the structure of the jib subassembly under the state of withdrawing compacter reasonable to reduce the space demand of jib subassembly in direction of height and width direction, thereby avoid the jib subassembly under the state of withdrawing to appear superelevation or super wide problem, and then realize optimizing jib subassembly structure, promote jib subassembly compactness, reduce jib subassembly space demand, promote the technological effect of product practicality.

In an embodiment of the present invention, preferably, as shown in fig. 9 and 10, the arm support assembly further includes: the side mechanism 158 includes two opposite hinged connecting ends, one connecting end is hinged with the folding arm 142, and the other connecting end is hinged with the telescopic arm 148.

In this embodiment, a telescopic arm 148 side-set method is proposed: a side mechanism 158 is further disposed in the boom assembly, wherein the side mechanism 158 includes two opposite hinged connecting ends, the two connecting ends are disposed in a staggered manner in the transverse or longitudinal direction, one of the connecting ends is connected with the folding arm 142, and the other connecting end is connected with the telescopic arm 148. Specifically, the side mechanism 158 is composed of a first arm head and a second arm head which are rotatably connected (i.e. hinged) with each other and laterally arranged, wherein the first arm head is connected with the second sub-folding arm 146, and the second arm head is connected with the telescopic arm 148. In the working process, the first arm head and the second arm head can rotate relatively, so that the second sub-folding arm 146 and the telescopic arm 148 can be laterally arranged on the same plane, the lateral space of the arm support mechanism 14 is effectively utilized, the space requirement of the length direction of the arm support mechanism 14 in the withdrawing state is reduced, the arm support assembly structure is optimized, the structural compactness of the arm support assembly is improved, the space requirement of the arm support assembly is reduced, and the technical effect of the product practicability is improved.

In any of the above technical solutions, preferably, as shown in fig. 11, the second sub-folding arm 146 is a laterally bent arm support structure, and the telescopic arm 148 is hinged to a laterally connected end of the second sub-folding arm 146.

In this embodiment, another telescopic arm 148 side approach is proposed: the second sub-folding arm 146 is arranged to be a laterally bent arm support structure, the side mechanism 158 in the first telescopic arm side method is replaced, in the assembling process, the telescopic arm 148 is hinged to the side connecting end of the second sub-folding arm 146, the second sub-folding arm 146 and the telescopic arm 148 can be laterally arranged on the same plane, the lateral space of the arm support mechanism 14 is effectively utilized, the space requirement of the arm support mechanism 14 in the length direction in the withdrawing state is reduced, the arm support assembly structure is optimized, the structural compactness of the arm support assembly is improved, the space requirement of the arm support assembly is reduced, and the technical effect of the product practicability is improved.

In an embodiment of the present invention, preferably, as shown in fig. 3, the driving mechanism includes: one end of the first oil cylinder 162 is hinged to the rotary base 12, and the other end of the first oil cylinder 162 is hinged to the first sub-folding arm 144.

In this embodiment, a first cylinder 162 is disposed in the boom assembly, and preferably, one end of the first cylinder 162 is a cylinder base, and the other end is a cylinder telescopic end. The base of the first oil cylinder 162 is hinged to the rotary base 12, the telescopic end of the first oil cylinder 162 is hinged to the first sub-folding arm 144, and the first oil cylinder 162 is connected to an oil pump through an oil path. During operation, the oil pump presses hydraulic oil into the first oil cylinder 162, so that the telescopic end of the first oil cylinder 162 extends out under the action of oil pressure, thereby driving the first sub-folding arm 144 to unfold relative to the rotary base 12. Correspondingly, when the oil pump withdraws the hydraulic oil in the first oil cylinder 162, the telescopic end of the first oil cylinder 162 retracts, so as to drive the first sub-folding arm 144 to retract to the rotary base 12. Moreover, the oil cylinder drive has the advantages of strong bearing capacity, stable movement and the like, so that the arm support mechanism 14 is more suitable for heavy-load occasions, and the technical effects of optimizing the arm support assembly structure and improving the movement stability and reliability of the arm support assembly are achieved.

In an embodiment of the present invention, preferably, as shown in fig. 6, 7 and 8, the driving mechanism further includes: a first bar set 164, the first bar set 164 comprising: a first lever 166, one end of the first lever 166 is hinged with the other end of the first sub-folding arm 144; a second rod 168, one end of the second rod 168 is hinged with one end of the second sub-folding arm 146, and the other end of the second rod 168 is hinged with the other end of the first rod 166; one end of the second oil cylinder 170 is hinged with the first sub-folding arm 144, and one end of the second oil cylinder 170 is hinged with the first rod 166; a second bar set 172, the second bar set 172 comprising: a third rod 174, wherein one end of the third rod 174 is hinged with the fixed end of the telescopic arm 148; a fourth lever 176, one end of the fourth lever 176 being hinged to the other end of the second sub-folding arm 146, and the other end of the fourth lever 176 being hinged to the other end of the third lever 174; one end of the third oil cylinder 178 is hinged with the fixed end of the telescopic arm 148, and the other end of the third oil cylinder 178 is hinged with the third rod 174; a third bar set 180, the third bar set 180 comprising: one end of the fifth rod 182 is hinged with the telescopic end of the telescopic arm 148; a sixth rod 184, wherein one end of the sixth rod 184 is hinged to the tail end arm 156, and the other end of the sixth rod 184 is hinged to the other end of the fifth rod 182; one end of the fourth oil cylinder 186 is hinged with the tail end arm 156, and the other end of the fourth oil cylinder 186 is hinged with the fifth rod 182; wherein the hinge point of the first and second sub-folding arms 144 and 146 is not coincident with the hinge point of the first lever 166 and the first sub-folding arm 144; the hinge point of the first and second sub-folding arms 144 and 146 is not coincident with the hinge point of the second bar 168 and the second sub-folding arm 146; the hinge point of the second sub-folding arm 146 and the telescopic arm 148 is not coincident with the hinge point of the third rod 174 and the telescopic arm 148; the hinge point of the second sub-folding arm 146 and the telescopic arm 148 is not coincident with the hinge point of the fourth lever 176 and the second sub-folding arm 146; the hinge point of the telescopic arm 148 and the trailing arm 156 does not coincide with the hinge point of the fifth rod 182 and the telescopic arm 148; the hinge point of the telescoping arm 148 and trailing arm 156 is not coincident with the hinge point of the sixth rod 184 and trailing arm 156.

In this embodiment, the driving mechanism further includes a first rod set 164 and a second cylinder 170, and preferably, one end of the second cylinder 170 is a cylinder base, and the other end is a cylinder telescopic end. The first rod set 164 is composed of a first rod 166 and a second rod 168, the first rod 166 is provided with three hinge points, and the second rod 168 is provided with two hinge points. During assembly, the first hinge point of the first rod 166 is hinged to the first folding sub-arm 144, and the hinge point is not overlapped with the hinge point of the first folding sub-arm 144 and the second folding sub-arm 146; the first hinge point of the second rod 168 is hinged to the second sub-folding arm 146, and the hinge point is also not overlapped with the hinge point of the first sub-folding arm 144 and the second sub-folding arm 146; the second hinge point of the first link 166 is hinged to the second hinge point of the second link 168. A set of four-bar linkages is thus formed by the first and second levers 166 and 168, the spacing between the hinge point of the first lever 166 and the first sub-folding arm 144 and the hinge point of the first and second sub-folding arms 144 and 146, and the spacing between the hinge point of the second lever 168 and the second sub-folding arm 146 and the hinge point of the first and second sub-folding arms 144 and 146. On the basis, the base of the second oil cylinder 170 is hinged with the first sub-folding arm 144, and the telescopic end of the second oil cylinder 170 is hinged with the third hinge point of the first rod 166. In the course of the work, the oil pump is with in the hydraulic oil pump sends the second hydro-cylinder 170, the flexible end of second hydro-cylinder 170 stretches out under the oil pressure, rotate with promoting first member 166 and second member 168, under above-mentioned four-bar linkage's effect, the sub-folding arm 146 of second expandes to required working angle from the position that is parallel to first sub-folding arm 144 mutually, and then realized the expansion and folding of the relative first sub-folding arm 144 of the sub-folding arm 146 of second, and realized optimizing arm support subassembly structure, promote arm support subassembly flexibility ratio, reduce arm support subassembly occupation space, promote the technical effect of product reliability and practicality.

The driving mechanism further comprises a second rod group 172 and a third oil cylinder 178, preferably, one end of the third oil cylinder 178 is an oil cylinder base, and the other end is an oil cylinder telescopic end. The second rod set 172 is composed of a third rod 174 and a fourth rod 176, the third rod 174 is provided with three hinge points, and the fourth rod 176 is provided with two hinge points. During assembly, the first hinge point of the third rod 174 is hinged to the telescopic arm 148, and the hinge point is not overlapped with the hinge point of the second sub-folding arm 146 and the telescopic arm 148; the first hinge point of the fourth rod 176 is hinged to the second sub-folding arm 146, and the hinge point is also not coincident with the hinge point of the second sub-folding arm 146 and the telescopic arm 148; the second hinge point of the third link 174 is hinged to the second hinge point of the fourth link 176. So that a set of four-bar linkages is formed by the interval between the third bar 174, the fourth bar 176, the hinge point of the third bar 174 with the telescopic arm 148 and the hinge point of the second folding sub-arm 146 with the telescopic arm 148, and the interval between the hinge point of the fourth bar 176 with the second folding sub-arm 146 and the hinge point of the second folding sub-arm 146 with the telescopic arm 148. On the basis, the base of the third cylinder 178 is hinged with the telescopic arm 148, and the telescopic end of the third cylinder 178 is hinged with the third hinge point of the third rod 174. In the course of the work, the oil pump is with in the hydraulic oil pump sends third hydro-cylinder 178, the flexible end of third hydro-cylinder 178 stretches out under the oil pressure, rotate with promotion third member 174 and fourth member 176, under above-mentioned four-bar linkage's effect, flexible arm 148 is expanded to required working angle from the position parallel with the sub-folding arm 146 of second mutually, and then realized the expansion and folding of the sub-folding arm 146 of the relative second of flexible arm 148, and realized optimizing armlet subassembly structure, promote the arm rest subassembly flexibility ratio, reduce arm rest subassembly occupation space, promote the technological effect of product reliability and practicality.

The driving mechanism further comprises a third rod group 180 and a fourth oil cylinder 186, preferably, one end of the fourth oil cylinder 186 is an oil cylinder base, and the other end is an oil cylinder telescopic end. The third rod group 180 is composed of a fifth rod 182 and a sixth rod 184, the fifth rod 182 is provided with three hinge points, and the sixth rod 184 is provided with two hinge points. During assembly, the first hinge point of the fifth rod 182 is hinged to the telescopic arm 148, and the hinge point is not overlapped with the hinge point of the telescopic arm 148 and the tail end arm 156; the first hinge point of the sixth link 184 is hinged to the trailing arm 156, and the hinge point is also not coincident with the hinge point of the telescopic arm 148 and the trailing arm 156; the second hinge point of the fifth link 182 is hinged to the second hinge point of the sixth link 184. A set of four-bar linkages is thus formed by the spacing between the fifth bar 182, the sixth bar 184, the hinge point of the fifth bar 182 to the telescopic arm 148 and the hinge point of the telescopic arm 148 and the trailing arm 156, and the spacing between the hinge point of the sixth bar 184 to the trailing arm 156 and the hinge point of the telescopic arm 148 and the trailing arm 156. On the basis, the base of the fourth cylinder 186 is hinged to the tail end arm 156, and the telescopic end of the fourth cylinder 186 is hinged to the third hinge point of the fifth rod 182. In the course of the work, the oil pump is with in the hydraulic oil pump sends the fourth hydro-cylinder 186, the flexible end of fourth hydro-cylinder 186 stretches out under the oil pressure, rotate with promoting fifth member 182 and sixth member 184, under above-mentioned four-bar linkage's effect, tail end arm 156 is expanded to required working angle from the position that is parallel to with flexible arm 148 mutually, and then the expansion and the folding of tail end arm 156 relative flexible arm 148 have been realized, and optimized arm frame subassembly structure has been realized, promote arm frame subassembly flexibility ratio, reduce arm frame subassembly occupation space, promote the technological effect of product reliability and practicality.

In one embodiment of the present invention, preferably, as shown in fig. 3, the telescopic arm 148 is a two-section telescopic arm or a three-section telescopic arm 148; the trailing arm 156 is a single folding arm or two folding arms, or the trailing arm 156 is a two-section telescopic arm or three-section telescopic arm.

In this embodiment, the telescoping arm 148 is a two-section telescoping arm or a three-section telescoping arm 148. Taking three-segment telescopic arm as an example, the telescopic arm 148 is composed of a first segment telescopic arm 150, a second segment telescopic arm 152 and a third segment telescopic arm 154. The first telescopic arm 150 is a main structure of the telescopic arm 148, and a section of the first telescopic arm is hinged with the second sub-folding arm 146, and the whole body is a tubular structure with a cavity inside. The two-section telescopic arm 152 is also a tubular structure with a cavity inside, and is arranged in the cavity of the one-section folding arm. The three sections of folding arms are arranged in the cavity of the three sections of folding arms. When the telescopic arm 148 is not extended, the two sections of telescopic arms 152 are positioned in the cavity of the one section of telescopic arm 150, and the three sections of telescopic arms 154 are positioned in the cavity of the two sections of telescopic arms 152; when the telescopic arm 148 is extended, the two-section telescopic arm 152 extends out along the cavity extending direction of the one-section folding arm, and the three-section telescopic arm 154 extends out along the cavity extending direction of the two-section telescopic arm 152, so that the tail end arm 156 connected with the three-section telescopic arm 154 is extended to a required working position. The nested telescopic arm 148 occupies a smaller space in a retracting state, so that the boom assembly is more exquisite and compact, the telescopic time of the nested telescopic arms 148 is shorter, the designated work can be quickly completed in a short time, the telescopic time is saved, the structure of the telescopic arm 148 is optimized, the working efficiency of the telescopic arm 148 is improved, the structure compactness of a product is improved, and the technical effect of the working reliability of the product is improved.

Tail end arm 156 is a section of folding arm or two sections of folding arms, the action is nimble, and through setting up tail end arm 156 into two sections of folding arms, the flexibility ratio of tail end arm 156 has been promoted, make tail end arm 156 can be more nimble convenient stride across the barrier and carry out fire control work, can also make tail end arm 156's work coverage further enlarge simultaneously, and then realize optimizing tail end arm 156 structure, promote arm support subassembly work flexibility ratio and coverage, promote product operational reliability's technological effect. By providing trailing arm 156 as a two-section telescopic arm or a three-section telescopic arm, trailing arm 156 may attain a longer length.

The utility model discloses a second objective provides a fire engine 1, as shown in fig. 3, fire engine 1 contains the jib subassembly of any one of above-mentioned arbitrary technical scheme, and this fire engine 1 has the whole beneficial effects of the pump body that any one of above-mentioned technical scheme provided. Simultaneously, this fire engine 1 still includes: the device comprises a vehicle body 20, wherein a workbench and a cab are arranged on the vehicle body 20, a rotary seat 12 is rotatably connected with the workbench, the rotary seat 12 is close to the cab, and an arm frame assembly is retracted on the workbench; a water cannon 30 disposed on the tail end arm 156; a water supply system provided on the vehicle body 20; the pipeline system is arranged on the vehicle body 20, one end of the pipeline system is connected with the water supply system, and the other end of the pipeline system is connected with the water cannon 30; wherein, in the state of withdrawing of jib subassembly, the folding arm and the flexible arm of jib subassembly and the length direction parallel arrangement of automobile body.

In this embodiment, vehicle body 20 is the major structure of fire engine 1, is provided with workstation and driver's cabin on it, and the driver's cabin is located one side of workstation, through rotating swivel mount 12 and workstation and linking to each other, makes swivel mount 12 can rotate relative to the plane of workstation, makes the cantilever crane subassembly can adjust cantilever crane subassembly to the exact operating position through the rotation of swivel mount 12 under the inconvenient adjustment orientation of fire engine 1. When the boom assembly is retracted, the boom assembly is positioned above the table and the vehicle body 20 is responsible for carrying the boom assembly. Further, by disposing swivel base 12 close to the cab, the boom assembly can be extended toward the rear of vehicle body 20 to avoid interference of the boom assembly with the cab during deployment; on the other hand, compare in the setting mode that swivel mount 12 kept away from the driver's cabin, set up swivel mount 12 and can increase the length of jib subassembly to a certain extent in the position that is close to the driver's cabin, reduce automobile body length to make fire engine 1 structure compacter, the practicality is stronger.

By arranging the water cannon 30 on the tail end arm 156, the fire fighting truck 1 can convey the water cannon 30 to the fire source through the extending boom assembly and extinguish the fire source through the high-pressure water column ejected by the water cannon 30, so that fire fighting operation is realized. Wherein, still be provided with water supply system and the pipe-line system that keeps water cannon 30 work on the automobile body, water supply system, pipe-line system and water cannon 30 link to each other in proper order, and water supply system sends the fire-fighting water pump to the pipe-line system in the working process to finally spout from water cannon 30 department, in order to accomplish the fire control operation through water cannon 30. In addition, because in the state of withdrawing of jib subassembly, the folding arm of jib subassembly and the length direction parallel arrangement of flexible arm and automobile body, compact structure can satisfy the high demand of fire engine.

In a specific embodiment of the present invention, the arm support mechanism 14 may further have the following extension structure:

1) the folding arm 142 includes, but is not limited to, two sections, and more stages of sub-folding arms may be added on the basis of the first sub-folding arm 144 and the second sub-folding arm 146;

2) the telescopic arm 148 includes but is not limited to three sections, and more stages of sub telescopic arms 148 can be added on the basis of a two-section telescopic arm 152 and a three-section telescopic arm 154;

3) the trailing arm 156 includes, but is not limited to, a segment, and the trailing arm 156 may be composed of a plurality of sub-folded arms;

4) the end of the tail arm 156 may be fitted with any fire fighting device other than the water monitor 30, such as: a firefighter head and a solid firefighter nozzle;

5) besides the driving mechanism of the oil cylinder and the rod group explained in the scheme, a hydraulic motor can be arranged to directly drive the structures at the two ends of the hinge point to rotate.

In the present invention, the terms "mounting", "connecting", "fixing" and the like are used in a broad sense, for example, "connecting" may be a fixed connection, a detachable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A boom assembly for a fire fighting vehicle, said boom assembly comprising:

rotating;

the arm support mechanism comprises:

one end of the folding arm is hinged with the rotary seat, and the folding arm comprises at least two sub-folding arms which are hinged with each other;

the fixed end of the telescopic arm is hinged with the other end of the folding arm;

the tail end arm is hinged with the telescopic end of the telescopic arm;

the driving mechanism is connected with the arm support mechanism;

the driving mechanism is used for driving the folding arm to rotate relative to the rotary seat, driving the telescopic arm to rotate relative to the folding arm and driving the tail end arm to rotate relative to the telescopic arm.

2. The boom assembly of claim 1, wherein the folding arm comprises:

one end of the first sub-folding arm is hinged with the rotary seat;

and one end of the second sub-folding arm is hinged with the other end of the first sub-folding arm, and the other end of the second sub-folding arm is hinged with the fixed end of the telescopic arm.

3. The boom assembly of claim 2, wherein in a retracted state, the first sub-folding arm, the second sub-folding arm, the telescoping arm, and the trailing arm are at least partially parallel to one another.

4. The boom assembly of claim 2, wherein in a retracted state, the second sub-folding arm is directly below the first sub-folding arm;

the telescopic arm is positioned on the side of the first sub-folding arm, and the telescopic arm and the first sub-folding arm are positioned on the same horizontal plane;

the tail end arm is located under the telescopic arm.

5. The boom assembly of claim 2, further comprising:

the side mechanism comprises two connecting ends which are hinged oppositely, one connecting end is connected with the folding arm, and the other connecting end is connected with the telescopic arm.

6. The boom frame assembly of claim 2, wherein the second sub-folding arm is a laterally bent boom structure, and the telescopic arm is hinged to a lateral connecting end of the second sub-folding arm.

7. The boom assembly of claim 2, wherein the drive mechanism comprises:

one end of the first oil cylinder is hinged to the rotary seat, and the other end of the first oil cylinder is hinged to the first sub-folding arm.

8. The boom assembly of claim 3, wherein the drive mechanism further comprises:

a first set of bars, the first set of bars comprising:

one end of the first rod piece is hinged with the other end of the first sub-folding arm;

one end of the second rod piece is hinged with one end of the second sub-folding arm, and the other end of the second rod piece is hinged with the other end of the first rod piece;

one end of the second oil cylinder is hinged with the first sub-folding arm, and the other end of the second oil cylinder is hinged with the first rod piece;

a second set of bars, the second set of bars comprising:

one end of the third rod piece is hinged with the fixed end of the telescopic arm;

one end of the fourth rod is hinged with the other end of the second sub-folding arm, and the other end of the fourth rod is hinged with the other end of the third rod;

one end of the third oil cylinder is hinged with the fixed end of the telescopic arm, and the other end of the third oil cylinder is hinged with the third rod piece;

a third bar set comprising:

one end of the fifth rod piece is hinged with the telescopic end of the telescopic arm;

one end of the sixth rod is hinged with the tail end arm, and the other end of the sixth rod is hinged with the other end of the fifth rod;

one end of the fourth oil cylinder is hinged with the tail end arm, and the other end of the fourth oil cylinder is hinged with the fifth rod piece;

wherein a hinge point of the first sub-folding arm and the second sub-folding arm is not coincident with a hinge point of the first rod and the first sub-folding arm;

the hinge point of the first sub-folding arm and the second sub-folding arm is not coincident with the hinge point of the second rod piece and the second sub-folding arm;

the hinge point of the second sub-folding arm and the telescopic arm is not superposed with the hinge point of the third rod piece and the telescopic arm;

the hinge point of the second sub-folding arm and the telescopic arm is not superposed with the hinge point of the fourth rod piece and the second sub-folding arm;

the hinged point of the telescopic arm and the tail end arm is not overlapped with the hinged point of the fifth rod piece and the telescopic arm;

and the hinge point of the telescopic arm and the tail end arm is not superposed with the hinge point of the sixth rod piece and the tail end arm.

9. The boom assembly of any of claims 1-8, wherein the telescopic boom is a two-section telescopic boom or a three-section telescopic boom;

the tail end arm is a section of folding arm or two sections of folding arms, or the tail end arm is a section of telescopic arm or three sections of telescopic arms.

10. A fire fighting vehicle comprising the boom assembly of any of claims 1-9, said fire fighting vehicle further comprising:

the crane comprises a vehicle body, a workbench and a cab are arranged on the vehicle body, the swivel base is rotatably connected with the workbench and is close to the cab, and the jib assembly is retracted on the workbench;

the water cannon is arranged on the tail end arm;

the water supply system is arranged on the vehicle body;

the pipeline system is arranged on the vehicle body, one end of the pipeline system is connected with the water supply system, and the other end of the pipeline system is connected with the water cannon;

and in the retraction state of the jib assembly, the folding arm and the telescopic arm of the jib assembly are arranged in parallel with the length direction of the vehicle body.

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